[ship]

Lots of Euro lamps use the odd pin config. Helps with DC circuits and perhaps 240v circuits plus low voltage. More efficient... thanks for the info, not so sure beyond it confirmed it is a off type lamp used. What is stated is no more better than any other literature about more efficient lamps in often not hart to beat a earlier style but not relating to other similar sources.

Given the filament, less efficient given a gobo or hard edge I would think. More efficient than a HPL 575, depends on the HPL 575 and the condition of the fixture I would suppose in being possible.

On the other hand in what is not stated, not very common a GLA or HPL lamp has an expected lamp life of 2,000 hours these days. Some do but all at 115v. On the other hand, if not 120v for the HPL lamp, I would be surprised at your observations in not seeing the 115v HPL lamps as brighter given the higher color temp.

Ah' a large field in lamps and the Colortran it would now seem adds to it. I'm curious about their fixtures now given this info. Kind of cool to have a third style of Leko lamp used domestically. On the other hand, unless you can adjust the seat height of the lamp like 1CM each way (about 3/8"), that 600w lamp is about all that will fit into the fixture for maximum wattage and that given a 750w world for normal Lekos and even a 1Kw world for zooms makes this fixture even if decent lamp, limited.